Door-lock.



A. J. HBLMS.

DOOR LOCK.

APPLIUATION FILED AUG. a, 1909.

Patented Dec.27, 1910.

M a a Y AD ././//////A,///

Du EN. y N

ATTORNEYS .-HnNaRms PETERS cc., wAsmNamN. n. c.

u ARTHUR JOSEPH HELMS, 0F FORTLAND, OREGON.

DOOR-LOCK.

Speeication of Letters Patent. Patented Dec, 27, 1910.

Application filed August 3, 1909. Serial No. 511,007.

To all 'whom 'it may concern:

Be it known that I, ARTHUR J. HELMs, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have made certain new andnseful Improvements in Door-Locks, of which the following is a specification.

My invention 1s an improvement 1n door locks, and consists in certain novel construetions and combinations of parts, hereinafter described and claimed.

The object of the invention is to provide a lock operated by a knob, and normally retained in locked position by a tumbler, the tumbler preventing the use of the knob until released by a key.

Referring to the drawings forming a part hereof: Figure l is a front view of the lock, Fig. 2 is a longitudinal section showing the lock in one position, Fig. 3 is a similar view showing the lock in another position, Fig. 4 is a section on the line 4-4 of Fig. 2, Fig. 5 is a section on the lineA 5-5 of the same figure, and Fig. 6 is a side view of a portion of the key.

The present embodiment of the invention, consists of a casing 1, provided with a plurality of openings, for receiving screws 2 whereby it may be secured to a door 3, and with an opening 4 for the insertion of a key.

A sliding bolt 5, is arranged within the case, and is normally retained in locked position'by a coil spring 6, arranged between the end ofthe bolt, and the adjacent end of the casing.

The bolt is provided near one end with a transverse opening 7, and at approximately the transverse center of the opening when the bolt is locked, the casing is provided with alined openings in the opposite walls through which and the opening 7, extends a bar 8, to whose ends are secured the knobs 9 in the normal manner.

The bar is provided in the opening with a transverse integral lug 10, projecting on one side of the bar, and the lug is adapted to engage a notch 11 in a wall of the opening for moving the bolt inwardly, the said wall having a lip 12, at the edge of the notch, which is beveled on its outer face as at 13.

The bolt as shown in Figs. 4 and 5 is circular in cross section, and the casing is provided with a guide-way 14 also circular in cross section, in which the bolt slides. The bolt is also provided with a recess 15, opening on the lower face of 'the bolt, and a longitudinal groove 16 is provided in the bottom of the recess.

The recess extends the full width of the bolt, as shown in Fig. 4, and the opening 4 for the key hole is in register with the recess at all times. A spring 17 is secured to the lower face of the bolt, adjacent to the opening 7, by a screw 18 and the free end of the spring extends into the recess 15, alongside the end wall thereof, andis curved outwardly therefrom as shown at 19.

Bars or tumblers each consisting of sec-l tions 20 and'21, arranged at an angle to each other, and pivoted to the bottom at 22, are arranged in the recess, and the free end of the section 20, is notched as at 23, for engagement by the bit 25 of the key 24 for swinging the tumblers on their pivots 22.

When the bolt is in the position shown in Fig. 2, the free end of the section 21, engages a pin 26, extending through the recess 15, and also engages the lip of the spring 17, thus locking the bolt against movement by the knob, and the free end of the section 20 is inclined downwardly, the bars resting upon a pin 27, also extending across the recess.

When the key is inserted in the key hole and turned, the sections 2O of the tumblers are lifted into horizontal position and into the groove 16, and the sections 21 are turned into the position shown in Fig. 3, thus disengaging the end of the same from the pin 26, so that the bolt may be moved back against the resistance of the spring 6 by turning the knob. As soon as the knob is released, the spring 6 returns the bolt to locked position, and the pin 27 by its engagement with the sections 21 of the tumbler swings them into the position shown in Fig. 2, in which position it is retained by the spring 17.

It will be evident from the description, that the bolt is locked against movement by the knob, at all times, except when the tumbler is released by the key. lt will also be evident that one or more tumblers may be made use of as desired.

It will be understood that the pin 27 is connected with the casing, and is consequently stationary. The tumblers are pivoted on the bolt and move therewith. The said pin is in position for engagement by the tumblers, when the bolt is moved in either direction. When the key is turned, it engages the front ends of the tumblers,

and swings them on the pivot, thus disengaging their rear ends from the pin 26. Then the spring l0 moves the bolt outwardly, the lower edges of the tumblers move along it and the end 2l is swung upwardly. The pin 27 is necessarily placed near the pivot 22 in order not to interfere with the swinging oi the tumblers by the key.

I claim:

l. A lock comprising a casing, a bolt slidable therein and provided with a transverse opening therethrough, the casing having opposite openings registering with t-he opening of the bolt, a bar extending through. the registering openings and provided with a lateral lug, the opening having in one wall a lip for engagement by the lng to move the bolt to unlocked position, a spring for releasing the bolt, said bolt having a recess,

- and a longitudinal groove in the bottom thereof, the casing having key hole openings registering with the recess, tumblers in the recess each comprising integral sections arranged at an angle to each other, and pivoted to the bolt, a pin arranged transversely of the casing and passing through the recess, said pin being adapted for engagement by the inner ends of the tumblers, a

spring secured to the bolt, for normally retaining the tumblers in engagement with the pin to prevent inward movement of the bolt, the outer end of the tumblers having a recess for engagement by a key to swing the other ends out of engagement with the 2.v A lock comprising a sliding bolt, a bar provided with a lug, said bolt having an vopening through which the bar passes, and

having a lip within the opening, said lip having a flat face for engagement by the lug to move the bolt when the bar is turned in one direction, and a beveled face to permit the key to slip thereover when. the bar is turned in the other direction, a tumbler pivoted to the bolt, and having one end adapted for engagement by a key, to swing the tumbler a lixed pin for engagement by the other end to lock the bolt, and means for returning the tumbler to its original posi tion when the bolt moves outwardly.

3. A lock comprising a sliding bolt, a bar provided with a lug, said bolt having an opening through which the bar passes, and having a lip within the opening, said lip having a flat 'a'ce for engagement by the lug to move the bolt when the bar is turned in one direction, and a beveled face to permit the lug to slip thereover when the bar is turned in the other direction, a tumbler on the bolt, and a fixed support for engagement by the tumbler to lock the bolt.-

4l. In a lock of the class described, a sliding bolt, a spring for normally retaining the bolt in locked position, a tumbler pivoted to the bolt, a fixed pin with which the tumbler is normally engaged to retain the bolt in locked position, said tumbler having means for engagement by a key to release the same, a knob, and means on the knob for engaging the bolt to move the same.

ARTHUR JOSEPH HELMS. lVitnesses:

F. G. l/Vmon, G. WV. HARVEY. 

